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LEARWATER <br /> G R O U P, I N C . <br /> EnUironmenfa! Services <br /> 00 <br /> Mr. Kelly Stradinger April 5, 1996 <br /> Boettcher Western Properties, Ltd. <br /> 77 West Wacker Drive, Suite 2700 <br /> Chicago, Illinois 60601-1694 <br /> Re: Quarterly Monitoring Report, Boettcher Western Properties, <br /> 4555 North Pershing Avenue, Stockton, California <br /> Dear Mr. Stradinger, <br /> Enclosed is the Quarterly Monitoring Report recently completed for the <br /> Boettcher Western Properties on Pershing Avenue in Stockton. This report <br /> includes data'for the first quarter 1996. Copies of the report will also be sent to <br /> Ms. Brooke -Birkie of Neumiller & Beardslee and Mr. Harlin Knoll of the San <br /> Joaquin County Public Health Services/Environmental Health Division <br /> (PHS/EHD). <br /> Data collected on March 14, 1996 indicates that groundwater levels have risen <br /> 3.6 to 3.7 feet since December 1995. Relatively low. concentrations of <br /> petroleum hydrocarbons as gasoline (TPHg) were detected in the sample from <br /> downgradient monitoring well MW-5 for the third consecutive quarter; <br /> :-however, benzene;..toluene, ethylbenzene, and xylenes (BTEX) have not been <br /> detected in any of the MW-5 samples. Benzene concentrations in samples <br /> from monitoring wells MW-3 and MW-4 have generally decreased over the <br /> past year. <br /> Please feel free to contact me at 510-893-5160 if you have questions regarding <br /> the contents of this report. <br /> Sincerely, <br /> CLEARWATER GROUP, INC. <br /> eanna S. Hudson <br /> Senior Geologist <br /> Enclosure <br /> cc: Ms. Brooke Birkie, Neumiller & Beardslee <br /> Mr. Harlin Knoll, San Joaquin County PHS/EHD ' <br /> 520 Third Street,Suite 104 + Oakland,California 94607 * Telephone 510-893-5160 4, Fax 510-893-5947 <br />